High Resolution Observations of Cataclysmic Variables -- Cycle 0

Details High Resolution Observations of Cataclysmic Variables -- Cycle 0 High Resolution Observations of Cataclysmic Variables -- Cycle 0

Jul 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990hst..prop.1253p&link_type=abstract

HST Proposal ID #1253

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Hst Proposal Id #1253

Scientific paper

It is proposed to explore at high spatial and moderate spectral resolution the close environments of ten cataclysmic variable stars known or suspected to possess complex surrounding emission nebulosities. The study will be conducted using the narrow band and interference filters centered on bright nebular emission features of hydrogen, carbon and oxygen. A wide combination of unique FOC capabilities including coronography, polarimetry and the high resolution apodizer will be employed to study in depth the most representative object of each class of cataclysmic variables. These capabilities will allow shells of ejecta around recent novae to be distinguished from the central star at a much earlier stage in their evolution and to detect very much fainter ejecta from old novae than possible from the ground. The basic aim of this study is to gain insight into the physical conditions of the nebula, the geometry of the nova explosion and the nature of the interstellar medium local to the nova. The proposed study of symbiotic systems, on the other hand, should permit resolving the objects into their postulated compact sources, barely resolving the accretion disk around the hot component, and determining the precise connection of the disk with the jets. The program also aims at assessing the possibility of using novae as extragalactic distance indicators.

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